Design and development of computer hardware and software; Providing temporary use of online non-downloadable computer software for displaying dynamic codes to produce a neuromodulatory response, displaying visual neurocodes and visual stimuli, measuring physiological effects on a user in response to displayed images, and displaying images to produce a neuromodulatory response; Providing a web site featuring temporary use of non-downloadable software for delivering optimized dynamic visual, auditory, sensory, and electrical stimulation to increase alertness, improve focus and attention, promote wakefulness, and enhance cognitive performance; Platform as a service (PAAS) featuring computer software platforms for delivering optimized dynamic visual, auditory, sensory, and electrical stimulation to increase alertness, improve focus and attention, promote wakefulness, and enhance cognitive performance; Software as a service (SAAS) services featuring software for delivering optimized dynamic visual, auditory, sensory, and electrical stimulation to increase alertness, improve focus and attention, promote wakefulness, and enhance cognitive performance; Software as a service (SAAS) services featuring software using artificial intelligence (AI) for delivering optimized dynamic visual, auditory, sensory, and electrical stimulation to increase alertness, improve focus and attention, promote wakefulness, and enhance cognitive performance; Providing temporary use of online non-downloadable computer software applications for delivering optimized dynamic visual, auditory, sensory, and electrical stimulation to increase alertness, improve focus and attention, promote wakefulness, and enhance cognitive performance